Limekiln



J. MOGREGOR;

LIMBKILN No, 17,885. Patented July 28,1185?.

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` without batter in the walls.

vis built the first section B of the superstruc- K To all whoml it may concern:

. tion through the UNITED sTATEs PATENT oEEroE.

JOHN MCGREGOR, OF SELMA, ALABAMA.

LIMEKILN.

Specication of Letters'Patent No. 17,885, dated July 28, 1857.

.Be it known that I, JOHN MGGREGOR, of Selma,'in the county of Dallas and State of Alabama, have invented certain new and useful Improvements in Limekilns, and I do hereby declare the following to be a full, clear, and exact descri tion of the construction and operation of t e same, reference being had to the accompanying drawings, which make a part of this specification, in which Figure 1, represents an elevation in perspective. Fig. 2,` re resents a vertical sec- 'ng and Fig. 3, re resents a horizontal section taken at the ine x, x, of Fig. 2'.

Similar letters of reference where they occur in the several figures denote like parts of the kiln in all of them.

The nature of my invention relates especially to the manner in which I have arranged the furnaces or re chambers in combination with the draft holes and lire flues, around the, inner square chamber of the kiln.

To enable others skilled in the art to make and use my invention, I will proceed to describe the same with reference to the drawings.

A represents the base of the structure, which may be square, and have its sides On this base ture, which is in the form of a truncated cone, on its outside, and inclosing a square chamber C slightly contracting in area as it rises. And upon this section B, is raised the upper or top section D, also of a truncated cone shape and inclosing a chamber, which is a continuation of the chamber C. At the top of the first section B, of the stack,

, is an opening E, where the charge of limestone is fed in, and immediately below this point E additional or vreversed batter isl given to the masonry, as at a, to prevent the charge from clogging. The bottom of the inside of the stack or the chamber inclosed y thereby is rapidly contracted at its lower end F, and terminates in a cooling it Gr, into which the burned lime drops, an from whence it may be drawn through the opening H, at proper intervals, the kiln being of thekind known as perpetual kilns.

At the four corners ofthe base A of the kiln are arranged, respectively, the arched recesses I, I, I, I, from each of which a pasn for admitting the fire into the bosch or chamber of the kiln.

b, b, &c., are the grate bars upon which the wood or coal that is used for fuel is placed, and underneath them are ash pits c, c, &c. Draft holes d, d, &c., are made through the outer walls, through which the air that sup lies combustion is introduced. These draft lioles are opposite the openings M, in the ire walls L, and tend to drive the Haine and heat through said openings into chamber C, where the lime is burned. The fire is thus brought in horizontally at all four of the sides of the chamber C, the draft being across the iires, or at right angles to the fire chamber.

e, e, are port holes through which the charge can be loosened up, or the process of burning examined from the outside of the kiln. From each of the recesses I, a flue eX- tends, as seen in dotted lines at j, j, in Fig. 2, up through the walls' until they rise above thetop of the iirst section B, of the stack, and then said flues enter the chamber C, the gases carried up therein mingling with those driven oif from the lime stone burned in the said chamber below. Draft holes i, i, &c., are also made from the ash pits and extend from said pits into the front of the passages J, that lead into the ire chamber. The crowns of the fire chambers, are arched as seen at N, Fig. 2, so as to turn the fiame toward the openings in the fire wall, and direct it into the burning chamber C.

Having thus fullv described the nature of my invention, what I claim therein as new, and desire to secure by Letters Patent, 1s-

The particular arrangement of the furnaces or fire chambers K, K, K, K, in relation to each other, and to the square chamber C, when the same are constructed and used in combination with the draft holes d, d, and fire flues M, in the manner, and for the purpose herein set forth and described.

JOHN MOGREGOR.

Witnesses:

JAS. A. WORKS, S. D. `RADEEER. 

